linux-kernel - Re: [PATCH RFC] vfs: make fstatat retry on ESTALE errors from getattr call

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Message-ID: <20120413120232.GA27179@umich.edu>
Date:	Fri, 13 Apr 2012 08:02:32 -0400
From:	Jim Rees <rees@...ch.edu>
To:	Jeff Layton <jlayton@...hat.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org, pstaubach@...grid.com,
	miklos@...redi.hu, viro@...IV.linux.org.uk, hch@...radead.org,
	michael.brantley@...haw.com
Subject: Re: [PATCH RFC] vfs: make fstatat retry on ESTALE errors from
 getattr call

Jeff Layton wrote:

  +retry:
   	error = user_path_at(dfd, filename, lookup_flags, &path);
   	if (error)
   		goto out;
   
   	error = vfs_getattr(path.mnt, path.dentry, stat);
  +	should_retry = error == -ESTALE ? retry_estale(path.dentry) : false;
   	path_put(&path);
  +	if (should_retry) {
  +		lookup_flags |= LOOKUP_REVAL;
  +		goto retry;
  +	}
   out:
   	return error;
   }

This is starting to look like FORTRAN.  Maybe turn this into a "do while"?
Then you could make the "goto out" into a break and get rid of them both.
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